Jonna Ann Maas, M.D.
Internal Medicine Physician · Marshall, MN
Jonna Ann Maas, M.D. is an internal medicine physician with a practice address in Marshall, Minnesota, and NPI 1699187831, issued on May 22, 2014. Check the license (Minnesota 61915, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Jonna Ann Maas
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 61915 MN
Self-reported in NPPES; status is on the state search - Practice location
- 300 S Bruce St, Marshall, MN 56258
- Phone
- (507) 532-9661
- Enumerated
- May 22, 2014
- Record last updated
- Oct 12, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (507) 537-9053
- Medicaid ID
- 1699187831 MN
- Medicare enrollment
- Enrolled (PECOS I20181018000389); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 2018
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,632 in Minnesota → Look up another NPI →
Also registered at 300 S Bruce St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Anyasike, MDFamily Medicine Physician1366475774
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- Brittany Bailey, PHARMDAmbulatory Care Pharmacist1598275935
- Amanda Beranek, OTROccupational Therapist1790942217
- Courtney Blomme, APRN, CPNPPediatric Nurse Practitioner1326322975
- Theresa Bly, APRN, CNPFamily Nurse Practitioner1760460836
Verify Jonna Ann Maas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 61915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
158 Medicare Part D claims for 57 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Cefdinir18 claims
- Metoprolol Tartrate13 claims
- Potassium Chloride12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Avera MarshallMarshall, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonna Ann Maas among 2,632 internal medicine physician records in Minnesota
Jonna Ann Maas, M.D. is one of 2,632 internal medicine physician records with a practice address in Minnesota. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 66% of them.
- NPI issued2014 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2018 · median 2008 among the 1,700 with a school on file
- Record last updated2018 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 internal medicine physician records list a practice address in Marshall
They are 6 of the 407 NPPES records with a practice address in Marshall, and 2,632 internal medicine physician records in Minnesota.
All 2,632 in Minnesota → Every provider in Marshall → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Julijana Botic, M.D.Marshall, MN 562581013277409
- Ying Long, M.D.Marshall, MN 562581437600947
- Timothy Michals, M.D.Marshall, MN 562581164620464
- Nishant Parmar, M.D.Marshall, MN 562581861759946
- Joseph Willett, DOMarshall, MN 562581558337865
- John Stock, M.D.Morris, MN 562671932207545
- Larry Grong, D.O.Dawson, MN 562321871653758
- Maritza Lopez, M.D.Canby, MN 562201598777948
Common questions
What is Jonna Ann Maas, M.D.'s NPI number?
Jonna Ann Maas, M.D.'s National Provider Identifier (NPI) is 1699187831, issued on May 22, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Jonna Ann Maas, M.D. located?
The NPPES record lists a practice address at 300 S Bruce St, Marshall, MN, 56258. Phone: (507) 532-9661. Providers update this record themselves, so call before visiting.
How can I verify Jonna Ann Maas, M.D.'s license?
NPPES lists Minnesota license number 61915, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonna Ann Maas, M.D. prescribe under Medicare Part D?
In 2024, Jonna Ann Maas, M.D. had 158 Medicare Part D claims for 57 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.